Date: Thu, 18 Jul 2024 19:57:27 +0300 From: Anton Shepelev <anton.txt@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Cannot seem to throttle individual cores with hwpstate_intel Message-ID: <20240718195727.d4f457c37c7e168b62861d4a@gmail.com> References: <20240716013741.17158bb56952618f8d748515@gmail.com> <PAVPR08MB9506A442595DFC26FD7FD89EADA32@PAVPR08MB9506.eurprd08.prod.outlook.com>
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Alexey Vyskubov: > this is not how it works for me on i3-12100F (14.1-p2): > > for cpu in $(seq 0 7); do sysctl dev.hwpstate_intel.$cpu.epp; sysctl dev.cpu.$cpu.freq; done > dev.hwpstate_intel.0.epp: 50 > dev.cpu.0.freq: 1450 > dev.hwpstate_intel.1.epp: 50 > dev.cpu.1.freq: 1165 > dev.hwpstate_intel.2.epp: 50 > dev.cpu.2.freq: 1248 > dev.hwpstate_intel.3.epp: 50 > dev.cpu.3.freq: 1152 > dev.hwpstate_intel.4.epp: 50 > dev.cpu.4.freq: 799 > dev.hwpstate_intel.5.epp: 50 > dev.cpu.5.freq: 799 > dev.hwpstate_intel.6.epp: 50 > dev.cpu.6.freq: 799 > dev.hwpstate_intel.7.epp: 100 > dev.cpu.7.freq: 799 Thank you for the test, Alexey. In your case, the per-core settings seem to take at least some effect. Since the load balancer seems to prioritise cores with lower indices, I wonder what the same test would show if core 0 instead of core 7 had an .epp of 100. Under what kind of load did you perform your test, and does load affect the frequencies?help
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